I didn't know there was a .40s&w +P. I certainly wouldn't put anything labeled as such in one of my guns. Where did you get the brass?

It's probably just standard brass stamped +P for marketing. Weigh a few and see how they compare to the rest of your .40 brass. If they are much heavier (thicker web) I wouldn't use them for anything over mid-range loads.

I just re-read and caught the .45acp part. If it's .45acp brass that's +P then those probably do have thicker webs. But that cartridge runs at such a low pressure anyway I don't segregate them. It would probably make a difference to bullseye shooters.

__________________
Proud member of the NRA and Texas State Rifle Association. Registered and active voter.

There is no SAAMI standard for 40 S&W +P but that hasn't stopped ammo from being sold under that term. There is however 45acp +P brass, ammo and an official SAAMI pressure ceiling for it.

I always found it ironic when people are reluctant to use +P brass for anything but reduced power load, given that it is either the exact same as normal brass or reinforced to handle extra pressure. You would have to contact the manufacturer of the brass to know which it is as SAAMI only specifies external dimensions.

I did a water weight test with some +p brass, and regular brass from the same maker. They were so close to the same I could care less if it says +++++++++ a global thermo nuclear mega uber ICBM warhead.

They load and shoot just the same.

__________________
No matter how many times you do it and nothing happens it only takes something going wrong one time to kill you.

Starline makes their 9mm and .38spl +P brass the same as normal with only the headstamp changing.

Quote:

Originally Posted by Starline Web Page

38+P
1.140 - 1.150 O.A.L.
38 SPL+P has no difference from the standard 38 SPL, other than headstamp designation for load segregation. This is due to the fact that our standard case design will handle +P pressures with no problems.

They say their .45acp brass is made with a thicker web at the base.

Quote:

45 ACP+P, 45 Automatic+P
0.892 - 0.897 O.A.L.
The 45 Auto+P is a strengthened version of the 45 Auto with the same external dimensions. A thicker web and heavier sidewall at base strengthens the case in potentially unsupported areas. This case has approximately 2 grains less internal water capacity than the standard 45 Auto.

This email link is to reach site administrators for assistance, if you cannot access TFL via other means. If you are a TFL member and can access TFL, please do not use this link; instead, use the forums (like Questions, Suggestions, and Tech Support) or PM an appropriate mod or admin.

If you are experiencing difficulties posting in the Buy/Sell/Trade subforums of TFL, please read the "sticky" announcement threads at the top of the applicable subforum. If you still feel you are qualified to post in those subforums, please contact "Shane Tuttle" (the mod for that portion of TFL) via Private Message for assistance.

This email contact address is not an "Ask the Firearms Expert" service. Such emails will be ignored. If you have a firearm related question, please register and post it on the forums.